Dry gas meter



Aug. 18', 1925. 1,550,150

' A.G.COOKEETAL DRY GAS METER Filed May 25. 1923 Patented Aug. ld, "M25.

ALBERT GEORGE 000KB AND BENJAMIN CHARLES PHILLIPS, OF BREGHTON, ENGLAND.

DRY GAS METER.

Application filed May 25,

To all whom it may concern:

Be it known that we, Anni-1.131 Gnonon Cooke and BENJAMIN GuaninePIHLLQS, both British. subjects, residing at Cambridge Grove, WilburyRoad, Hove, Brighton, in the county of Sussex, England, have inventednew and useful Improvements in or ltelating to Dry Gas Meters, of whichthe following is a specification.

This invention relates to certain new and useful improvements in bellowsapplicable to dry gas meters, and has for one of its objects to providea simple and efficient means of attaching the flexible material of thediaphragm to the rim.

Another object of our invention is to provide an improved bellcws,whereby the diaphragm can easily be attached or detached from thetapered rim.

A further object of our invention is to eliminate the cracking andpuncturing of the flexible diaphragm as hitherto known to occur by theaction of the gas bellows.

A still further object of our invention is to provide a gas bellows,wherein the component parts require very little skill in assembling, andthe capacity of the bellows can be adjusted to suit any type of dry gasmeter.

()ur invention consists of a tapered sheet metal rim which is slotted toallow the gas to egress by the action of the gas bellows in the usualmanner, and is provided with an annular groove or recess on the interiorat a suitable distance from the outer edge, which latter is turned outat right angles for the purpose as hereinafter described.

On each side of the partition provided in a dry gas meter, we mount oneof the aforesaid rims by means of the conical end turned outwards toform a flange whereby a sound and gastight joint is procured.

The detachable diaphragm is made from leather, or any other suitableflexible material of a greater diameter than the metallic rim, foradjusting the capacity of the bellows to suit any particular type of drygas meter, said leather or the like is stitched over a wire ring, andinterposed between two metallic discs having the peripheral edge turnedover to obviate chamfering of the flexible material, and are held inposition by a threaded lug and nut passing through the center of thediscs and flexible material respectively.

The aforesaid discs have a small annular 1923. Serial No. 641,522.

groove in the form of a male and female wherein the leather or the likeis compressed to prevent leakage which has been known to occur at thepoint where the lug passes through.

The detachable diaphragm is placed over the tapered rim and afteradjustment is aliixed thereto by means of a split ring inserted into theannular recess, and the respective ends of the split ring arejuxtapositioned by a suitable tool engaging in a conntersink at each endof the ring, whereby the flexible material is held between the rim andthesplit ring giving a gastight joint without the puckering of thematerial.

In the accompanying drawings 1, is a front view of the gas bellows; 2,is a side view partly in section of Fig. 1; Fig. 3, is an enlargedsectional detail shewing the method of fixing the diaphragm to thetapered rim, and Fig. 4:, is an enlarged detail of the split ring.

Uur invention comprises two metallic pered shaped rims at, having thegas passage at l), and their conical end is turned outwards to form aflange 0, and soldered on to a partition (Z, provided in a dry gas meteras shewn in Fig. 2. An annular groove or recess a, is stamped or swagednear the end remote from the said partition 0?, and the outer ends f ofthe said rims a, are incurvated outwards for the purpose as hereinafterset forth.

The flexible diaphragm actuating as the bellows is cemposed of leatheror the like g, of a large diameter which outer edge is stitched on to awire ring 71, and the central part of which is interposed between twometallic discs 2', and 2' having their peripheral edges turned away fromthe said leather 9, to prevent the latter from being perforated by theaction of the bellows. Said discs 2', and 2' are secured in position bymeans of a threaded lug j, soldered to the inner disc i arior to fixingthe diaphragm, passing through an orifice Z, provided in the center ofthe diaphragm and engaging with a nut 70, as shewn in Fig. 3.

To ensure a gastight joint at the center of the diaphragm, we swage anannular groove 2, and 3, of a small diameter in the discs 2', and 71respectively, whereby the leather g, is compressed therein when the nut7c, is screwed on to the lug Over the aforesaid nut 70, we lightlysolder a sheet metal cap m, giving a neat iii niiis ed APPLZHELDCQ LOthe diaphi The a described diaph m is placed over "the rim a; and afterhejusted is connected thereto by a split ii inserted over the leather 9,into the 1 cm) c, the ends overlapping allow easy insertion of the saidring a, and adj ustment of the bellows to the requisite capacity, andthe ends of the split ring a, are forced into juxtaposition by mea s ofa suitaole tool engaging in a countersink 0, in the said enc s, wherebythe ring is expanded and is forced into contiguity as sh wn in Fig. 1.

A tongue or extension piece "0, is pr vided to prevent the leather 5from being penetrated by the ends of the aforesaid split a, when the l:er is attached or detached, and giving gas tight joint, and at the sametime eliminating .ny puckering or puncturing oi the flexible material.

The object of having the r'ns of, tapered allows for easy access andfixing of the split ring a, and to assist. in emptying the chamberthoroughly.

From the foregoing description it will be readily seen and understoodthat there is no puclrering or creasi of the leather or the like 9,which is entirely prevented from cracking and causing a leakage of bythe action of the diaphragm as hitherto known to occur.

The wired edge and surplus material of the diaphragm rests upon or overthe edge of the rim (4.

'l he above described diaphragm can easily be detached from he rim a, bydisengaging the split ring 72, from the annular recess a, by means or asuitable tool whereby the said diaphragm can then be lifted oil andexamined when desired.

Fi e claim.

1. In a dry gas meter, a gas bellows, a sheet metal partition, two rimssoldered thereto, each of said rims provided with a gas outlet and acircumferential groove near the outer end which latter is curved "1;. awe iiva'ole dianl 3 mat *rial with wij 1 having annular groove a Icentral ,lllCG, said flexible material irw'e' posed between said discsand secured at the center, a split ring with a (repression in itsrespective ends adapted to fit in said circumferential groove over theremovable diaphragm.

In a dry gas meter, a gas bellows, a s ieet metal partition, two taperedrims with the conical. ends turned outwards and soldered on each side ofsaid partition, each of =id rims provided with a outlet and a rentialgroove near the outer end, vnich latter is curved, a removable diaphragm partly of a zihle material with a wired edge, two dis eachprovided with ann lar groove and a central orifice, said Flexiblematerial interposed between said discs being secured at the center bymeans of a lug and nut, a split ring with a depression in its espectiveends adapted to lit in said circ'uin'l erential groove over saidremovable diaphragm.

3. In a dry gas meter, a gas bellows. a sheet metal partition, two rimssoldered thereto, each of said rims provided with a gas outlet and acircumferential groove near the outer end which latter are curved out-.vards, a removable diaphragm partly of a flexible material with a wirededge, an es:- tension piece stitched to said wired edge, two discs eachprovided with an annular groove and a central orifice, said :lexiblematerial interposed between said discs and secured the center by meansof a three ed lug secured to the inner discs, and a nut screwed on oversaid outer disc, a cap soldered over said nut to the outer disc, a splitring with a depression in its respective ends adapted to lit in saidcircumferential groove over said diaphragm.

ALBERT GEORGE COOKE. BENJAMIN CHARLES PHILLIPS.

